Abstract: PVA-H/HA composites were prepared by ultrasonic mix method and in situ synthesis method.The mechanical and tribological properties of specimen with different HA content were measured.Worn surfaces were investigated by using a scanning electron microscope to determine the wear mechanism of pure PVA-H and PVA-H/HA composites prepared by different methods.Experimental results show that filling HA to PVA-H slightly decreased the friction coefficient of composites with increasing of HA content under water lubrication condition.Wear resistance of PVA-H matrix was also greatly improved by the introduction of HA inorganic component.It also found that the PVA-H/HA prepared by in situ method exhibited better tribological properties than those prepared by mix method with the same components and under the same conditions.The composites exhibited the best wear resistance when the HA content was about 4% prepared by in situ synthesis.